Here are three chicks from the same split IB parents.
This one is much lighter and more solid than the others.
This one is a little darker with white on its shoulders and white flights.
And this one is the darkest with white flights.
Here they are together for comparison.
The parents are both IB splits to something unknown. I think the lighter one is either a cameo or purple female. Not sure about the one with white shoulders, but I think the other is an IB split.
This one is much lighter and more solid than the others.

This one is a little darker with white on its shoulders and white flights.

And this one is the darkest with white flights.

Here they are together for comparison.

The parents are both IB splits to something unknown. I think the lighter one is either a cameo or purple female. Not sure about the one with white shoulders, but I think the other is an IB split.